Preparation of Co-CoTiO3/TiO2 and Performance of High Temperature Proton Exchange Membrane Batteries
United Chemical Reaction Engineering Research Institute, Changzhou University Branch, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
Abstract：Compared with the low-temperature proton exchange membrane fuel cell, the high-temperature proton exchange membrane fuel cell has a simpler hydrothermal management system, and the higher operating temperature, which not only enhances the electrochemical reaction performance, but also improves the anti-CO poisoning performance of the catalyst, so it is a kind of fuel cell with great application potential. In this work, nanorod-like TiO2 was first synthesized by hydrothermal method, and then the nanorod-like TiO2 was added in the process of synthesizing the metal-organic framework (ZIF-67). The resulting precursor was calcined under nitrogen atmosphere, and finally a series of Co-CoTiO3/TiO2 catalysts with different Co contents were obtained. The structure of the catalysts was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), and the oxygen reduction (ORR) performance of the catalysts was evaluated in 0.1 mol/L KOH electrolyte. The results showed that the 15 mmol-Co-CoTiO3/TNT-800 has the best ORR activity, with the half were potential of 0.84 V, the initial potential of 0.92 V and the limit current density of 4 mA/cm2, which were close to those of 20%Pt/C (in which the mass of Pt accounts for 20% of the total catalyst) under the same test conditions. In high temperature proton exchange membrane fuel cell applications, the highest power density was 9 mW/cm2 at 180 ℃ and 40 mA/cm2.
XU Boyang,HE Xiaobo,YIN Fengxiang et al. Preparation of Co-CoTiO3/TiO2 and Performance of High Temperature Proton Exchange Membrane Batteries[J]. 化学反应工程与工艺, 2021, 37(2): 160-166.
